Improvement in core-bar for moulds used in casting- metal



hindert tudes stent dimite."

FREDERICK sHICKLE, 'or sr. Louis, MISSOURI.

team Pawn: N 92,108, dared June 29, 1869.

The Schedule referred to in these Letters Patent and making pari: of the same.

To all whom. it may concern:

Be it known that I, FREDERICK SHIoxLn, of St. Louis, in the county of St. Louis,`iu thel State of Missouri, have made certain vnew and useful Improvements in Core-Barrels or Bars Used in Casting Pipes or Hollow Cylinders of Metal; and Ido hereby declare that the following is a full and true account thereof, reference heilig had to the accompanying drawings, and to the letters'of reference marked thereon.

This invention relates 'to the use of a metallic or other elastic coring-barrel or cylinder, which is divided at a single longitudinal line of its circumference, thus forming a cylinder, which may be pressedopen at said division-line, hut which, by its elasticity, (and under the aid of' devices acting therewith,) will return to its original form, when the opening-pressure is removed. y

Said inventionrelates, furthermore, to the use of certain devicesfor forcing open said core-barrel, and to the use of a wedge-piece for completing the circnmfereuce'offthe cylinder thus opened; the devices for opening the barrel being moreover formed and adjusted to furnish an axle for revolving thereon the core-barrel, in theoperaton of attaching clay and turning or scraping the surface of the clay, this being accomplished in the manner now usually employed.

It is plain that in the use of an expanded core-bar rel, formed as thus generally indicated, when the metal has been poured into the mould, the operator may withdraw the wedge-piece, and relieve .the pressure upon the expanded core-bar, and then the contracting metal (as it cools) will shrink without distortion, and the core-barrel may be lifted out withoutbreakage or v damage.

To enable those herein skilled to make and use my said improvement, I vwill now more fully de scrihe the saine, referring herein to the accompanying- Figure l as a plan, and to Figure 2 as a sectional elevation of the core-barrel and its operati11g-devices before expansion.

Figure 3 is a plan, representing the same after eX'- pansion.

I employ the cylinder A, usually of cast-iron, and perforated (to allow for escape of the' gases formed in casting) in the usual manner.

Said cylinder forms the core-barrel, it being, in use, coated on its exterior circumference and surface with clay, and blacked.

Said corebarrel is cut open at the point A', and

the adjoining edges of the barrel are here tapered to iit the .bevel ofthe wedge-pieceB.

Said wedge-piece is used to expand the barrel A, its outer end-surface forming, when the barrel is exindicated in fig. 3.

To move said wedge-piece, and generally-to expand the barrel, and support the same, I arrange the series of levers now to he described.

`Diametrically opposite to the point of division of thebarrel A I arrange the bearings C, -for the shaft D, said bearings being secured'to the harrel A. v

The shaft D will be turned by a crank or similari device, by the operator, and the same then actuates the thrust lever 'E through the cam d.'

The lever E carries, at its other'end, the centre axle F.

points intermediate. between A' and O, and t'o-also regulate the expanding-action ofthe wedge B'when pressed forward, I arrange, at proper intermediate points G, bearings, by which levers H will connect \with the axle F generally, as indicated. Connecting with said axle F, I further arrange the lever '13', which attaches to the said wedge-piece B The operator, in turning the shaft D, will then, by the cam d, force the lever E forward, and thereby lalso move the shaft or axle F, and the several levers B' is made a gradual one by the'movement of the levers H in conjunction with the said movement ofthe key- -piece B.

' By this arrangement of devices, and by this action thereof, the core-barrel is expanded, as shown in iig. 3; and the dimensions of the parts are taken in such wise that the position of the axle F now obtained will be central to the expanded figure of the core-barrel.

This axle may therefore be used to support the corebarrel in applying the clay coating, and in smoothing the same to a true cylinder.

In order to-prevent the core-barrel from too great an expansion. at the joint with the wedge B, owing will he passed through the wedge B and the adjoining flanges of the core-barrel A7 and for a further security, tie-holts may be connected with this part of the core-barrel A, and extend to the axle F or the bearings C.

In order to guide the wedge B in its movement, a feather, b', is used, which prevents the adjoining edges of the core-barrel A from lateral play.4

.It may he advantageous to hinge the barrel A at the point C, or-at some other intermediate point. This may be accomplished, andthe expansion of the barrel may nevertheless be by a single wedge-piece. ,i In all such modilications of form and construction of the core-barrel, the advantages arising from the sim panded, a part of the outer surface of the barrel, as

In order thatthe core-barrel may be supportedat' and H. Thus the wedge-piece B is pressed out, causing the core barrel A to expand, and the expansion to unequalpressures which may arise, check-bolts b4 2. The intermediate supports G und levers H, when combined with the levers E and B', to support the axle F, substantially as sei", forth. v

FREDERICK SHIGKLE.

Witnesses i GEO. P. Hen'rrmn, Jr., WILLIAM W. HERTHEL. 

